© 2012 Farlex, Inc. All Rights Reserved. Medical definition of radioreceptor assay: an assay for a substance and especially a hormone in which a mixture of the test sample and a known amount of the radiolabeled substance under test is exposed to a measured quantity of receptors for the substance and the amount in the test sample is determined from the proportion of receptors occupied by radiolabeled molecules of the substance under the … Definition of assay in the Definitions.net dictionary. to examine or analyze: to assay a situation; to assay an event. 8. A laboratory test to find and measure the amount of a specific substance. Assaulting a police officer, counterclaims. assay - a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc. An assay usually aims to measure an analyte's intensive propertyand express it … Assay Validation: Comprehensive experiments that evaluate and document the quantitative performance of an assay, including sensitivity, specificity, accuracy, precision, detection limit, range and limits of quantitation. assay - a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or … The sample containing virus (1) is added and, after washing several times, enzyme conjugated to an antibody to the virus is added (2). This is one of the proteins in the body that helps the blood clot. Assay: An assay is an analysis done to determine: Assay is also used as a verb and has several related meanings in this role: The words "assay" and "essay" are often confounded, a cardinal sin according to some word mavens. assay definition: 1. to perform an examination on a chemical in order to test how pure it is 2. to perform an…. 7. assay - WordReference English dictionary, questions, discussion and forums. Definition and synonyms of assay from the online English dictionary from Macmillan Education.. ELISA: With antigen capture ELISA, the wells are coated with antibody to the virus. This is a rapid immunochemical test that involves an enzyme (a protein that catalyzes a biochemical reaction). Looking for definition of Assay? 10. The biological or pharmacological potency of a drug. McGraw-Hill Concise Dictionary of Modern Medicine. However, "assay" and "essay" share a common ancestry. Enzyme-linked immunosorbent assay ( ELISA ): ELISA stands for "enzyme-linked immunosorbent assay." 2. Assay is also used as a verb and has several related meanings in this role: To try or attempt. (noun) A quantitative determination of the amount of a given substance in a particular sample. MedicineNet does not provide medical advice, diagnosis or treatment. In other words, a test to determine something about a substance. This is important to commodities and futures involving precious metals, in which the quality of the underlying metals must be specified in the contract. Thus, an assay may be done for example to determine the level of thyroid hormones in the blood of a person suspected of being hypothyroid (or hyperthyroid). This is often carried out on a microscope slide where the cell m… It is usually... | Meaning, pronunciation, translations and examples Lab medicine The quantification of a substance of interest by a specific chemical, enzymatic, immunologic or radioimmune-mediated reaction. This is the British English definition of assay.View American English definition of assay.. Change your default dictionary to American English. A colored product is formed if the viral antigen is present in the sample (4). assay. The presence of a substance and the amount of that substance. biopsy - examination of tissues or liquids from the living body to … The measured entity is often called the analyte, the measurand, or the target of the assay. What does assay mean? To judge the value, the worth of something. ", To analyze a mixture for one or more of its components. The factor V (five) assay is a blood test to measure the activity of factor V. This is one of the proteins in the body that helps the blood clot. The analyte can be a drug, biochemical substance, or cell in an organism or organic sample. Farlex Financial Dictionary. 9. Definition of ASSAY (noun): chemical test of a substance. In the process, the single cells under investigation are placed in low melting point agarose which is a gel-like polysaccharide derived from seaweed. We use cookies to enhance your experience on our website, including to provide targeted advertising and track usage. (Entry 1 of 2) 1 : examination and determination as to characteristics (as weight, measure, or quality) 2 : analysis (as of a drug) to determine the presence, absence, or quantity of one or more components — compare bioassay. A chemical examination of metals, by which the quantity of valuable or precious metal contained in any mineral or metallic mixture is ascertained. See additional information. Assay. © 2002 by The McGraw-Hill Companies, Inc. The enzyme-linked immunosorbent assay (ELISA) (/ ɪˈlaɪzə /, / ˌiːˈlaɪzə /) is a commonly used analytical biochemistry assay, first described by Engvall and Perlmann in 1971. Check the assay name and version number to make sure the correct assay definition has been imported. You are here: Home / Medical Terms / A / assay. Define Assay by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary. Information and translations of assay in the most comprehensive dictionary definitions resource on the web. To test precious metals for their purity. It also involves an antibody or antigen (immunologic molecules). A chemical assay, as studied under the branch of chemistry called analytical chemistry, is divided into qualitative (identity) analysis and quantitative (amount of substance) analysis. Medical Definition of assay. An attempt; an essay. In terms of drug testing, a type of assay known as an immunoassay is performed to detect the presence of drug metabolites in urine. For example, an assay may be done of a vaccine to determine its potency. A April 2020 6. The biological or pharmacological potency of a drug. Assay is a procedure for the examination or determination of quality or strength of a substance. What is Assay . For example, an assay may be done of a vaccine to determine its potency. A chemical examination of metals, by which the quantity of valuable or precious metal contained in any mineral or metallic mixture is ascertained. Assay explanation. Bookmark, Share & Be Social. Listed under: Cancer Dictionary; Find More About 'assay' Both words come from the French "essai" which in turn came from the Late Latin "exagium" meaning the "act of weighing". All Free. 2. An assay is a process of analyzing a substance to determine its composition or quality. https://medical-dictionary.thefreedictionary.com/assay. An analysis of the chemical composition or strength of a substance. The term is often used in the mining industry to refer to tests of ore or minerals. An assay, in medical testing, is a test done to detect the presence, amount, or potency of a substance found in a sample. 6 Importing Assay Definition File 302-4026, Rev. Full Definitions of assay 1 n a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc. assay définition, signification, ce qu'est assay: 1. to perform an examination on a chemical in order to test how pure it is 2. to perform an…. Assay definition: An assay is a test of a substance to find out what chemicals it contains. Some of the methods used in qualitative analysis include extraction, distillation, precipitation and other methods that determine physical and chemical properties. Assay: An assay is an analysis done to determine: The presence of a substance and the amount of that substance. Learn more. Finally, after a further cycle of washing, the enzyme's substrate (3) is added. 8. An assay procedure is generally employed to evaluate an intensive property of the measured entity, called "analyte". An assay is an investigative (analytic) procedure in laboratory medicine, pharmacology, environmental biology and molecular biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of a target entity (the analyte). Full Assay Validation will include inter-assay and inter-laboratory assessment of assay repeatability and robustness. After the assay definition file has been imported correctly, delete the temporary folder you created on the desktop. From Hart and Shears, 1997. ©1996-2020 MedicineNet, Inc. All rights reserved. assay Definition / meaning of assay. 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